A rapid method for the determination of nine haloacetic acids(HAAs) in wastewater effluent was established using reverse phase solid phase extraction pretreatment coupled with ultra-performance liquid chromatography-tandem mass spectrometry(RSPE UPLC-MS/MS).An ENVI-C18 cartridge was employed to remove organic substances in water sample to minimize its negative effect on HAAs analysis，and the pH value of sample was adjusted to 2.5 to eliminate the effect of inorganic ions on the ionization of HAAs.Under the optimal conditions，all the nine HAAs were separated within 15.0 min on a reversed phase liquid chromatographic column(HSS T3，2.1 mm×100 mm) using methanol-0.000 5% formic acid as mobile phase.The calibration curves were linear(r2=0.999 7-0.999 9) in the range of 0.5-100 μg/L for all the nine HAAs.The limits of detection(LODs) and limits of quantitation(LOQs) were in the range of 0.02-0.26 μg/L and 0.05-0.86 μg/L，respectively.The intra day and inter day relative standard deviations(RSDs) were in the range of 1.4%-10.0% and 1.7% -10.0%，respectively.The method recoveries ranged from 85.2% to 107.8% for effluent samples from three wastewater treatment plants at two spiked concentration levels of 2.5 μg/L and 10 μg/L.This method could meet the detection requirements for nine kinds of HAAs in wastewater effluents.